These Fritillaria Imperialis 'Rubra Maxima' bulbs are best planted in the fall months, blooming the following spring. 'Fritillaries can be planted from US hardiness zone 4 to US hardiness zone 8 ...

The small, checkerboard flowers of Fritillaria meleagris are both unique ... Snake's head fritillaries are hardy, 'thriving from US hardiness zone 4 to US hardiness zone 8,' Rachel adds.